/* .reddot::after{
content: " ";
position: absolute;
top: 10px;
padding: 3px;
z-index: 9999999;
background: #d9534f;
border-radius: 50%;
border: 1px solid #d43f3a;
} */
*{
    margin: 0;
    padding: 0;
}
.content{
    /* 旁边有留白 */
    width: 90%;
      /* 清除浮动 */
      /* overflow: hidden; */
      clear: both;
      margin: 0 auto;
}
.jumbotron{
    width: 100%;
    background-color:  rgb(63, 62, 62);
    
}
.jumbotron-left{
    width: 60%;
    float: left;
    padding-top: 100px;
}
.jumbotron-left h1{
    color: white;
    font-size: 40px;
   
    /* 离h1的距离 */
    margin-bottom: 20px;
}
.jumbotron-left p{
   color: #abcdef;
   font-size: 16px;
   line-height: 24px;
}
.jumbotron-left button{
     width: 200px;
    height: 50px;
    background-color: #df4444;
    color: white;
    font-size: 20px;
    border-radius: 25px;
    border: solid 1px #df4444;
    margin-top: 20px;
}.jumbotron-left button:hover{
    /* 透明色 */
    background-color: transparent;
    color: #df4444;
    cursor: pointer;
}
.jumbotron-left img{
    width: 400px;
    float: right;
}